CHAUSSURE IMPERMEABLE A L`EAU PERMEABLE A L`HUMIDITE.

MOISTURE-PERMEABLE WATERPROOF SHOE

Abrégé français

Une chaussure imperméable à leau perméable à lhumidité comprend une tige définissant un espace intérieur, une enveloppe intérieure fixée dans lespace intérieur et une semelle extérieure fixée sous la tige. Lenveloppe intérieure comprend une enveloppe en forme de chaussure perméable à lhumidité et imperméable à leau et une feuille de polyuréthanne thermoplastique. Lenveloppe en forme de chaussure perméable à lhumidité et imperméable à leau comprend une surface inférieure de lenveloppe intérieure et définit un espace pour le pied. La feuille de polyuréthanne thermoplastique comprend une surface supérieure fixée à la surface inférieure de lenveloppe intérieure par une méthode de soudage par haute fréquence et couvre et scelle complètement ladite surface inférieure, de sorte que lenveloppe en forme de chaussure perméable à lhumidité et imperméable à leau présente une bonne imperméabilité sans devoir attacher des bandes imperméables à la surface inférieure de lenveloppe intérieure.

Abrégé anglais

A moisture-permeable waterproof shoe includes an
upper unit defining an inner space, an inner sleeve
unit fixedly disposed in the inner space, and an
outsole unit fixedly connected to an underside of
the upper unit. The inner sleeve unit includes a
moisture-permeable waterproof shoe-like inner sleeve
and a thermoplastic polyurethane (TPU) sheet. The
moisture-permeable waterproof shoe-like inner sleeve
has an inner sleeve bottom surface and defines a
wearing space. The TPU sheet has a top surface
fixedly connected to the inner sleeve bottom surface
by a high-frequency welding method and completely
covering and sealing the inner sleeve bottom surface,
so that the moisture-permeable waterproof shoe-like
inner sleeve has a good waterproof effect without
the need to attach waterproof strips to the inner
sleeve bottom surface.

Revendications

9
WHAT IS CLAIMED IS:
1. A moisture-permeable waterproof shoe, comprising:
an upper unit defining an inner space having a
top open end and a bottom closed end;
an inner sleeve unit fixedly disposed in said
inner space and including
a moisture-permeable waterproof shoe-like
inner sleeve having an inner sleeve bottom surface
and defining a wearing space that has a top open end
and a bottom closed end, and
a thermoplastic polyurethane (TPU) sheet
having a top surface which is fixedly connected to
said inner sleeve bottom surface by a high-frequency
welding method, and which completely covers and seals
said inner sleeve bottom surface; and
an outsole unit fixedly connected to an underside
of said upper unit,
wherein
said moisture-permeable waterproof shoe-like
inner sleeve is made from a tailored sheet that
includes a lining cloth layer, a surface cloth layer
positioned on an outer side of said lining cloth
layer, a foam layer fixedly connected between said
lining cloth layer and said surface cloth layer, and
a moisture-permeable waterproof layer fixedly
connected to an outer side of said surface cloth
layer,
Date Regue/Date Received 2022-12-01

10
said tailored sheet includes a main sheet having
a front convex edge and a rear concave edge; and two
side wing portions symmetrically disposed on two
opposite sides of said main sheet portion and
integrally connected to said main sheet portion, each
of said side wing portions having a lateral seaming
edge, a front curved seaming edge connected between
said lateral seaming edge and one end of said front
convex edge, and a rear seaming edge connected
between said lateral seaming edge and one end of said
rear concave edge,
said front curved seaming edges of said side wing
portions are sewn to said front convex edge, said
lateral seaming edges of said side wing portions are
sewn to each other, and said rear seaming edges of
said side wing portions are sewn to each other to
thereby form said moisture-permeable waterproof
shoe-like inner sleeve,
said inner sleeve unit further includes a
waterproof element set disposed on an outer surface
of said moisture-permeable waterproof shoe-like
inner sleeve, said waterproof element set including
two first waterproof strips and a second waterproof
strip,
one of said first waterproof strips extends along
and covers a seam formed between said front curved
seaming edge of one of said side wing portions and
Date Regue/Date Received 2022-12-01

11
said one end of said front convex edge of said main
sheet portion, and the other one of said first
waterproof strips extends along and covers a seam
formed between said front curved seaming edge of the
other one of said side wing portions and the other
end of said front convex edge of said main sheet
portion,
said second waterproof strip extends along and
covers a seam formed between said rear seaming edges
of said side wing portions, and
said top surface of said TPU sheet seals a seam
formed between said lateral seaming edges of said
side wing portions which is located at said inner
sleeve bottom surface.
2. The moisture-permeable waterproof shoe as claimed
in claim 1, wherein said TPU sheet has a thickness
ranging from 0.2 mm to 0.3 mm.
3. The moisture-permeable waterproof shoe as claimed
in claim 1 or 2, wherein said inner sleeve unit
further includes a hot melt adhesive layer adhered
between said inner sleeve bottom surface and said
top surface of said TPU sheet by the high-frequency
welding method.
Date Regue/Date Received 2022-12-01

12
4. The moisture-permeable waterproof shoe as claimed
in any one of claims 1 to 3, further comprising an
adhesion layer adhered between an inner surface of
said upper unit and an outer surface of said inner
sleeve unit.
Date Regue/Date Received 2022-12-01

Description

1
MOISTURE-PERMEABLE WATERPROOF SHOE
FIELD
The disclosure relates to a moisture-permeable
waterproof shoe, and more particularly to a
moisture-permeable waterproof shoe including a
thermoplastic polyurethane sheet connected to an inner
sleeve thereof by a high-frequency welding method.
BACKGROUND
A conventional moisture-permeable waterproof shoe
generally includes an upper having a sock-shape, a
waterproof inner sleeve fixedly disposed in an inner
part of the upper, and an outsole fixedly disposed on
a bottom side of the upper. Waterproof strips are
usually attached onto the waterproof inner sleeve at
seaming edges to enhance waterproof effect. However,
once the waterproof strips are improperly attached to
the seaming edges at the bottom portion of the
waterproof inner sleeve, it would directly affect the
waterproof effect of the waterproof inner sleeve at the
bottom portion thereof.
SUMMARY
Therefore, an object of the present disclosure is
to provide a moisture-permeable waterproof shoe that
can alleviate at least one of the drawbacks of the prior
art.
According to the present disclosure, a
Date Recue/Date Received 2021-05-13

2
moisture-permeable waterproof shoe includes an upper
unit, an inner sleeve unit, and an outsole unit. The
upper unit defines an inner space having a top open end
and a bottom closed end. The inner sleeve unit is fixedly
disposed in the inner space, and includes a
moisture-permeable waterproof shoe-like inner sleeve
and a thermoplastic polyurethane (TPU) sheet. The
moisture-permeable waterproof shoe-like inner sleeve
has an inner sleeve bottom surface and defines a wearing
space having a top open end and a bottom closed end.
The TPU sheet has a top surface fixedly connected to
the inner sleeve bottom surface by a high-frequency
welding method. The outsole unit is fixedly connected
to an underside of the upper unit.
BRIEF DESCRIPTION OF THE DRAWINGS
Other features and advantages of the present
disclosure will become apparent in the following
detailed description of the embodiment with reference
to the accompanying drawings, of which:
FIG. 1 is a perspective view of a moisture-permeable
waterproof shoe according to an embodiment of the
present disclosure;
FIG. 2 is an exploded perspective view of the
embodiment;
FIG. 3 is an assembled schematic sectional view of
the embodiment;
FIG. 4 is an enlarged fragmentary sectional view of
Date Recue/Date Received 2021-05-13

3
FIG. 3;
FIG. 5 is a sectional view taken along line V-V of
FIG. 3;
FIG. 6 is another enlarged fragmentary sectional
view of FIG. 3;
FIG. 7 is a perspective view of a tailored sheet used
for making a moisture-permeable waterproof shoe-like
inner sleeve of an inner sleeve unit of the embodiment;
FIG. 8 is a perspective view illustrating how the
tailored sheet is folded into a prototype of the
moisture-permeable waterproof shoe-like inner sleeve;
FIG. 9 is a perspective view of the
moisture-permeable waterproof shoe-like inner sleeve
formed through sewing of the tailored sheet; and
FIG. 10 is a view similar to FIG. 9, but illustrating
a waterproof element set of the inner sleeve unit
covering seams of the tailored sheet.
DETAILED DESCRIPTION
Referring to FIGS. 1 to 4, an embodiment of a
moisture-permeable waterproof shoe 100 according to
the present disclosure includes an upper unit 10, an
inner sleeve unit 20, an adhesion layer 30, and an
outsole unit 40.
The upper unit 10 defines an inner space 11 having
a top open end and a bottom closed end. In this
embodiment, the upper unit 10 is made by sewing a cut
piece 12, and includes a toe stitched portion 13, a heel
Date Recue/Date Received 2021-05-13

4
stitched portion 14, the sole stitched portion 15,
and the rear end stitched portion 16 are formed by
sewing threads. In this embodiment, the cut piece 12
is made of a woven fabric, but is not limited thereto.
The inner sleeve unit 20 is fixedly disposed in
the inner space 11, and includes a moisture-permeable
waterproof shoe-like inner sleeve 21, a waterproof
element set 22 disposed on an outer surface of the
moisture-permeable waterproof shoe-like inner sleeve
21, and a thermoplastic polyurethane (TPU) sheet 23.
The moisture-permeable waterproof shoe-like inner
sleeve 21 has an inner sleeve bottom surface 211,
and defines a wearing space 27 having a top open end
and a bottom closed end. The TPU sheet has a top
surface 231 which is fixedly connected to the inner
sleeve bottom surface 211 by a high-frequency welding
method, and which completely covers and seals the
inner sleeve bottom surface 211, as shown in FIGS. 2
and 3.
In this embodiment, the moisture-permeable
waterproof shoe-like inner sleeve 21 is made from a
tailored sheet 24 that includes a lining cloth layer
241, a surface cloth layer 242 positioned on an outer
side of the lining cloth layer 241, a foam layer 243
fixedly connected between the lining cloth layer 241
and the surface cloth layer 242, and a moisture-
permeable waterproof layer 244 fixedly connected to
an outer side of the surface cloth layer 242. The
Date Regue/Date Received 2022-12-01

5
moisture-permeable waterproof layer 244 is made of
polyurethane (PU), but is not limited thereto.
Referring to FIGS. 7 to 9, in this embodiment,
the tailored sheet 24 includes a main sheet portion
25, and two side wing portions 26 symmetrically
disposed on two opposite sides of the main sheet
portion 25 and integrally connected to the main sheet
portion 25. The main sheet portion 25 has a front
convex edge 251 and a rear concave edge 252. Each of
the side wing portions 26 has a lateral seaming edge
261, a front curved seaming edge 262 connected
between the lateral seaming edge 261 and one end of
the front convex edge 251, and a rear seaming edge
263 connected between the lateral seaming edge 261
and one end of the rear concave edge 252.
The front curved seaming edges 262 of the side
wing portions 26 are sewn to the front convex edge
251, the lateral seaming edges 261 of the side wing
portions 26 are sewn to each other, and the rear
seaming edges 263 of the side wing portions 26 are
sewn to each other, thereby forming the moisture-
permeable waterproof shoe-like inner sleeve 21. In
this embodiment, the length of the front curved
seaming edge 262 of each side wing portion 26 is
substantially equal to one-half of the length of the
front convex edge 251 of the main sheet portion 25.
Referring to FIG. 10, in combination with FIGS. 4
Date Regue/Date Received 2022-12-01

6
and 9, the waterproof element set 22 includes two first
waterproof strips 221 and a second waterproof strip 222
fixedly adhered to an outer surface of the
moisture-permeable waterproof layer 244.
Specifically, one of the first waterproof strips 221
extends along and covers a seam formed between the front
curved seaming edge 262 of one of the side wing portions
26 and the one end of the front convex edge 251 of the
main sheet portion 25, and the other first waterproof
strip 221 extends along and covers a seam formed between
the front curved seaming edge 262 of the other side wing
portion 26 and the other end of the front convex edge
251. The second waterproof strip 222 extends along and
covers a seam formed between the rear seaming edges 263
of the side wing portions 26.
With reference to FIGS. 2, 4 and 5, the inner sleeve
unit 20 further includes a hot melt adhesive layer 230
adhered between the inner sleeve bottom surface 211 and
the top surface 231 of the TPU sheet 23 by the
high-frequency welding method so as to fixedly connect
the TPU sheet 23 and the moisture-permeable waterproof
shoe-like inner sleeve 21. It should be noted that the
hot melt adhesive layer 230 can strengthen the bonding
between the TPU sheet 23 and the moisture-permeable
waterproof shoe-like inner sleeve 21.
Referring again to FIGS. 4 to 6, in this embodiment,
the top surface of the TPU sheet 23 seals a seam formed
Date Recue/Date Received 2021-05-13

7
between the lateral seaming edges 261 of the side wing
portions 26 which is located at the inner sleeve bottom
surface 211. The TPU sheet 23 has a thickness ranging
from 0.2 mm to 0.3 mm.
Referring back to FIGS. 2 to 4, the adhesion layer
30 is adhered between an inner surface of the upper unit
and an outer surface of the inner sleeve unit 20.
The outsole unit 40, as shown in FIGS. 2 to 4, is
fixedly connected to an underside of the upper unit 10.
10 Based on the
above description, the advantages of
the moisture-permeable waterproof shoe 100 of this
disclosure can be summarized as follows:
1. By utilizing the high-frequency welding method
to heat the hot-melt adhesive layer 230, the TPU sheet
23 can be fixedly connected to and completely covers
and seals the inner sleeve bottom surface 211 of the
moisture-permeable waterproof shoe-like inner sleeve
21 and can seal the seam of the lateral seaming edges
261 of the side wing portions 26 located at the
inner sleeve bottom surface 211, thereby permitting
the moisture-permeable waterproof shoe-like inner
sleeve 21 to have a good waterproof effect. Further,
in comparison with the prior art, there is no need to
attach waterproof strips to the inner sleeve bottom
surface 211 of the moisture-permeable waterproof
shoe-like inner sleeve 21, thereby effectively
reducing the number of waterproof strips used.
Date Recue/Date Received 2022-12-01

8
2. Since the hot melt adhesive layer 230 can be used
to strengthen the bonding between the TPU sheet 23 and
the moisture-permeable waterproof shoe-like inner
sleeve 21, the sealing effect on the inner sleeve bottom
surface 211 of the moisture-permeable waterproof
shoe-like inner sleeve 21 can be enhanced.
In the description above, for the purposes of
explanation, numerous specific details have been set
forth in order to provide a thorough understanding of
the embodiments. It will be apparent, however, to one
skilled in the art, that one or more other embodiments
may be practiced without some of these specific details.
It should also be appreciated that reference throughout
this specification to "one embodiment , " "an
embodiment," an embodiment with an indication of an
ordinal number and so forth means that a particular
feature, structure, or characteristic may be included
in the practice of the disclosure. It should be further
appreciated that in the description, various features
are sometimes grouped together in a single embodiment,
figure, or description thereof for the purpose of
streamlining the disclosure and aiding in the
understanding of various inventive aspects, and that
one or more features or specific details from one
embodiment may be practiced together with one or more
features or specific details from another embodiment,
where appropriate, in the practice of the disclosure.
Date Recue/Date Received 2021-05-13

Dessin représentatif